United States. The USN Formal Dress Tunic of John Tucker "Chick" Hayward, Manhattan Project

The formal tunic of John Tucker "Chick" Hayward who was instrumental in Project Camel, and developing delivery systems and components for the Manhattan Project, effectively facilitating the coordinating the use of the Boeing B-29 Superfortress bombers in the dropping of Fat Man. 

A short tunic, constructed of high-quality black whipcord wool with a fold-down collar, peaked rolling lapels, and an open front. The front closure is double-breasted with a button-through design featuring three prominent vertically mounted gilt bronze buttons on each side of the coat. On the obverse of the buttons is a leftward-facing bald eagle perched on an anchor and surrounded by thirteen stars. The buttons measure 22.6 mm in diameter and are sewn directly to the tunic.  The reverse of each button is marked “Waterbury Button Co, Conn” in capital letters. There is a single reinforced buttonhole on either side of the opening with a matching gilded chained button clasp to close the jacket. The cuffs are of a folded no-button design with one broad strip of golden bullion wire tresse nearest to the cuff, with a narrow matching strip of tresse above, and ordained by an embroidered five-pointed star, all signifying the rank of Rear Admiral. The rear of the tunic is that of a sack design with a seam running up the center to join the two halves together. The interior is fully lined with black rayon material, with two vertical slit pockets built into the tunic, one on each side. The interior of the tunic has a tailor's label with “US. Navy - Naval Uniform Shop, Brooklyn, NY” embroidered in yellow lettering. On interior of inside pocket, Naval Uniform Shop label, Name: JT Hayward, Rank: VALM Corps: USN, 6/11/59. It measures 48 cm across the shoulders (seam to seam), with a sleeve length of 62 cm, and an overall body length of 52 cm, extremely fine. 

Footnote: John Tucker "Chick" Hayward (15 November 1908 – 23 May 1999) was an American naval aviator during World War II. He helped develop one of the two atomic bombs that was dropped on Japan in the closing days of the war. Later, he was a pioneer in the development of nuclear propulsion, nuclear weapons, guidance systems for ground- and air-launched rockets, and underwater anti-submarine weapons. A former batboy for the New York Yankees, Hayward dropped out of high school and lied about his age to enlist in the United States Navy at age 16. He was subsequently admitted to the United States Naval Academy at Annapolis, from which he graduated 51st in his class of 1930. He volunteered for naval aviation.